Natasha Collins Daniel: Spraying a probable carcinogen on food crops to kill them so they can be harvested faster – it sounds ridiculous – but it’s happening all across the UK on the wheat that makes our bread, flour and other things like biscuits. It gets worse. The weed killer in question, glyphosate, was recently classified by the World Health Organisation’s IARC (International Agency for Research on Cancer) as a probable carcinogen for humans – and new data analysis shows it’s appearing more and more frequently in our bread.